Membrane electrode for water electrolysis and preparation method thereof

A membrane electrode and electrolyte technology, applied in the field of membrane electrode and its preparation, can solve the problems of high cost, high cost, and restrictions on the wide use of SPE electrolyzers, and achieve the effects of low cost, reduced requirements, and small volume

Active Publication Date: 2012-11-21
ENN SCI & TECH DEV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the disadvantage of SPE electrolyzer is that it is expensive
At present, the commonly used PEM is DuPont's Nafion series. The cost of this membrane is relatively high, and in terms of catalyst selection, due to the strong acidity of the proton exchange membrane after immersion in water, the selection of catalyst metals is almost completely limited to platinum. , ruthenium, iridium and other precious metals and their alloys and oxides, and the electrolyzer made of this type of catalyst must use an ultra-pure water system to reduce catalyst poisoning
These have seriously restricted its widespread use

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  • Membrane electrode for water electrolysis and preparation method thereof
  • Membrane electrode for water electrolysis and preparation method thereof
  • Membrane electrode for water electrolysis and preparation method thereof

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preparation example Construction

[0045]The preparation method of the membrane electrode provided by the present invention includes coating a catalyst slurry containing a catalyst, a membrane solution, a binder and a solvent on a porous support layer to form a cathode and an anode catalytic electrode, and stacking the cathode and anode catalytic electrodes respectively to both sides of the basic polymer anion exchange membrane, and then pressed together by a hot press to form a three-in-one membrane electrode.

[0046] In the present invention, the introduction of the support layer improves the mechanical strength of the membrane electrode, increases the pressure resistance range of the electrolytic cell during electrolysis of water, and can also be used as a carrier for catalyst attachment. The support layers for the cathode and anode can be the same or different. The support layer can be divided into carbon fiber-based and metal-based support layers. Carbon fiber includes carbon paper, carbon cloth, carbon ...

Embodiment 1

[0071] 1) Cut 5×5cm as needed 2 of carbon paper (Toray TGP-H-060, Japan).

[0072] 2) Preparation of catalyst layer slurry

[0073] Anode catalytic layer slurry: Ni and Fe hydroxide catalyst (the molar ratio of nickel hydroxide and iron hydroxide in the catalyst is 2:1), binder polyethylene glycol solution (polyethylene glycol in the binder) The content of the dry film is 2wt%), the film solution (trimethyl quaternized polyetheretherketone solution, the content of the dry film is 8wt%, the solvent is a mixture of ethanol and DMF, and the mass ratio is 2:1), ethanol according to mass The mixture was mixed in a ratio of 1:10:5:5, and was stirred in an ultrasonic cleaner for 40 min with ultrasonic waves to obtain a uniformly mixed anode oxygen evolution catalyst slurry.

[0074] Cathode catalytic layer slurry: Ni, Cr and Mo metal alloy catalyst (the molar ratio of Ni, Cr and Mo in the catalyst is 2:2:1), binder polyurethane solution (the content of polyurethane in the binder is 8...

Embodiment 2

[0079] 1) Cut 5×5cm as needed 2 of carbon paper (Toray TGP-H-090, Japan).

[0080] 2) Preparation of catalyst layer slurry

[0081] Anode catalytic layer slurry: Ni and Fe oxide catalyst (the molar ratio of nickel oxide and iron oxide in the catalyst is 2:1), binder polyurethane solution (the content of polyurethane in the binder is 4wt%), membrane solution (trimethyl quaternized polysulfone membrane solution, the content of the dry film is 6wt%, the solvent is a mixture of ethanol and DMF, and the mass ratio is 3:1), ethanol is mixed according to the mass ratio of 1:5:10:5, And stirring for 60min while ultrasonic in an ultrasonic cleaner to obtain a mixed anode catalyst slurry.

[0082] Cathode catalytic layer slurry: Ni, Co and Mo metal alloy catalyst (the molar ratio of Ni, Co and Mo in the catalyst is 5:3:1), binder polyurethane solution (the content of polyurethane in the binder is 6wt%) ), membrane solution (trimethyl quaternized polysulfone membrane solution, the con...

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Abstract

The invention provides a membrane electrode for water electrolysis and a preparation method thereof. The membrane electrode sequentially comprises a cathode porous support layer, a cathode catalysis layer, an alkaline polymer electrolyte membrane, an anode catalysis layer and an anode porous support layer, wherein the cathode catalysis layer comprises non-noblemetal cathode hydrogen evolution catalyzer and alkaline polymer electrolyte, and the anode catalysis layer comprises a non-noblemetal anode oxygen evolution catalyzer and alkaline polymer electrolyte.

Description

technical field [0001] The present invention relates to a membrane electrode for water electrolysis and a preparation method thereof. Background technique [0002] Hydrogen is regarded as the most ideal energy carrier due to its cleanliness, non-polluting, high efficiency, storability and transportation. At present, many countries have invested a lot of research funds in the development of hydrogen energy systems. [0003] Hydrogen production from water electrolysis is currently the most widely used technology to convert renewable resources into hydrogen. When a direct current is applied to two electrodes (cathode and anode) immersed in the solution, water is decomposed and hydrogen and oxygen are produced at the cathode and anode, respectively. This process is the electrolysis of water. A membrane is added between the two electrodes, and the device for separating hydrogen and oxygen is an electrolytic cell. After the earliest phenomenon of water electrolysis was observe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B9/00C25B1/04
CPCY02E60/366Y02E60/36
Inventor 刘涛闫永臣曹萌王雁丁哲波
Owner ENN SCI & TECH DEV
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